EP0629429B1 - Procédé pour le traitement thermique des solides separés pendant la purification des effluents gazeux - Google Patents

Procédé pour le traitement thermique des solides separés pendant la purification des effluents gazeux Download PDF

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Publication number
EP0629429B1
EP0629429B1 EP94108600A EP94108600A EP0629429B1 EP 0629429 B1 EP0629429 B1 EP 0629429B1 EP 94108600 A EP94108600 A EP 94108600A EP 94108600 A EP94108600 A EP 94108600A EP 0629429 B1 EP0629429 B1 EP 0629429B1
Authority
EP
European Patent Office
Prior art keywords
finely divided
pulverulent
heat treatment
divided solids
filtering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94108600A
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German (de)
English (en)
Other versions
EP0629429A1 (fr
Inventor
Harald Wanger
Hans Rüegg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Innova AG
Original Assignee
Von Roll Umwelttechnik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Von Roll Umwelttechnik AG filed Critical Von Roll Umwelttechnik AG
Publication of EP0629429A1 publication Critical patent/EP0629429A1/fr
Application granted granted Critical
Publication of EP0629429B1 publication Critical patent/EP0629429B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/40—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by heating to effect chemical change, e.g. pyrolysis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B01D53/70—Organic halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/08—Toxic combustion residues, e.g. toxic substances contained in fly ash from waste incineration
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/20—Organic substances
    • A62D2101/22—Organic substances containing halogen
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/40—Inorganic substances
    • A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
    • A62D2101/40—Inorganic substances
    • A62D2101/45—Inorganic substances containing nitrogen or phosphorus

Definitions

  • the invention relates to a method for thermal treatment dusty and / or finely divided solids, that arise when cleaning flue gases.
  • PCDD polychlorinated Dibenzodioxins
  • PCDF polychlorinated dibenzofurans
  • the fly ash requires heat at this known methods supplied via the drum wall, thereby are for an effective treatment temperature of up to 400 ° C wall temperatures of up to 600 ° C required. At this high temperature causes this in the treatment arising chlorine the corrosion of the facility and in the low-melting salts present in the fly ash Caking build up, leading to blockage or constipation the system can lead.
  • the drum be provided with a vapor suction device, the Filter clogged regularly.
  • the object of the present invention is a method and a device for the thermal treatment of the flue gas cleaning resulting dust and fine particles To propose solids that are uninterrupted, continuous operation if possible guaranteed lower system temperature.
  • the thermal Treatment of the dusty and / or finely divided solid during the pneumatic transport of the Solid executed. It serves everyone individual dust particles and solid particles in contact coming, preheated to the desired temperature, flowing transport medium at the same time as a heat source, i.e. as a treatment medium. Hence the come treated solid and the resulting gases during the whole treatment with parts of the device undesirably high temperatures. As a result of There is hardly any pneumatic conveyance Risk of constipation. Any constipation can by periodically cleaning the pipeline with a annular cleaning plunger without interrupting the gas supply be prevented. Because the predetermined transport route is treatment line at the same time, the Device can be kept small and economical.
  • the solid becomes the end of the transport / treatment line separated from the gas stream by filtration, whereupon the solids-free Gas flow again as a transport / treatment medium can be used.
  • This gas flow leads the gaseous products of thermal treatment automatically out of the treatment area.
  • a thermal treatment can be carried out as required stationary post-treatment at about the treatment temperature, generally above 300 ° C, preferably above 400 ° C.
  • the after-treatment can be at least 2, preferably last longer than 4 hours. It is done expediently under an inert gas atmosphere.
  • the pressure in the system can be easily controlled by a blower can be controlled so that an undesirable air and so that oxygen entry can be prevented without any problems can.
  • the oxygen concentration should not exceed 3%.
  • dusty and / or to be treated according to the invention are finely divided solids from flue gas cleaning for example fly ash, dried salts from the Flue gas cleaning system of a waste incineration plant (Laundry salts) and loaded with environmentally harmful substances To name adsorption materials.
  • the invention is based on the single figure and Examples further illustrated.
  • Fig. 1 shows purely schematically a device for Implementation of the method according to the invention.
  • the inventive device shown in Fig. 1 1 for carrying out the thermal according to the invention Treatment has a screw metering device 2, the opens into a vertical pipe 3.
  • the vertical Pipeline 3 simultaneously forms one from below straight transport route running above and one Treatment room for the dusty and / or finely divided solids. It is the continuation of one horizontal pipeline 5, the combustion chamber 4th is connected upstream. Instead of a burner, the The gas flow can also be heated electrically. Of course, all pipes are in this Device isolated.
  • the vertical pipe 3 opens free in front of a filter 6 in an insulated heatable Dwell room 7 in which the aftertreatment takes place. Of the Filter 6 forms the upper horizontal end of the Dwelling space 7 and is with (not shown) ceramic filter cartridges.
  • the confluence 9 of the vertical pipe 3 is located in the dwell 7 in a wall 8 inclined towards the outside Dwell space, such that between the filter 6 and Dwell space 7 is not constricted.
  • On the inclined Wall 8 is provided with a vibrator (not shown).
  • a cleaning device 12 arranged for the vertical pipe 3. It is designed as an annular plunger and therefore also allows the gas flow to continue during the cleaning process.
  • On the clean side 11 of the Filters 6 connects another pipe 13, the with an exhaust gas fan 14 and one of the combustion chamber 4 upstream circulation fan 15 is connected. By means of the exhaust gas fan 14, part of the circulating Taken gas flow. This partial flow corresponds the one introduced above the gas burner of the combustion chamber Amount of gas.
  • Discharge device 16 here a trough chain conveyor, for the thermally treated solid.
  • the outlet 17 the discharge device 16 opens, if desired airtight, in a storage container 18.
  • a Inert gas supply 19 is provided, the connecting lines 21, 22 to the dwelling space 7 and to the discharge device 16 owns.
  • the transport route can be in any direction, e.g. horizontally, especially from top to bottom run.
  • a combustion chamber equipped with a propane gas burner becomes a flue gas stream cleaned of fly ash from a waste incineration plant to 480 ° C to 500 ° C warmed up.
  • This gas flow passes through an isolated one Pipeline in an also isolated vertical Pipe section.
  • the fly ash to be treated is in these vertical pipe section continuously metered.
  • the gas velocity is approx. 12 m / sec.
  • the fly ash is pneumatic vertically Pipe section over a distance of at least 2.5 m conveyed to a filter. During the promotion the fly ash is heated to 400 ° C or higher.
  • the filter has temperature-resistant ceramic filter cartridges on which the fly ash at a temperature of 400 ° C or higher.
  • the most secluded Fly ash goes from the filter directly into one below arranged dwell in which with nitrogen or Carbon dioxide maintain an inert gas atmosphere becomes.
  • the fly ash separated from the flue gas remains in the 400 ° C heated and insulated dwell room during 4 Hours.
  • the discharge of the fly ash after this Dwell time takes place using a suitable discharge system, e.g. a trough chain conveyor, one cooled screw conveyor or a cooling drum, level controlled.
  • the cooling of the material during discharge to a temperature below 200 ° C is desirable to a new formation of chlorinated hydrocarbons prevent.
  • the cooling can also be done by quenching respectively.
  • An is also displayed during the discharge operation a wall of the dwelling room inclined outwards arranged vibrator operated.
  • the oxygen concentration in the whole system is on 2 adjusted to 3% to destroy the chlorinated, especially aromatic to ensure hydrocarbons.
  • the flow rate of the Flue gas is also recorded: the flow rate of the Flue gas, its temperature before and after metering of the solid, the temperature in the filter and the Pressure loss across the filter.
  • the filter can be optional depending on the pressure drop or periodically cleaned will.
  • ammonia is added to the latter.
  • the excess Amount of ammonia is removed from the flue gas in a scrubber away.
  • the washer fluid is spray dried, the so-called laundry salt as a dry dust Product arises. That's in this laundry salt Ammonia as the ammonium salt and can be heated preferably released to temperatures above 300 ° C will.
  • the washing salt is made in the same way as in the Example 1 treated. In doing so, however lower temperatures are applied and the discharge of the treated washing salt after filtering can without Dwell time.
  • the expelled ammonia is further used, preferably by dissolving the gaseous Ammonia in water, e.g. in a gas washer.
  • the obtained solution is from any existing Mercury freed by means of an ion exchanger and fed again to the nitrogen oxide reduction.
  • the flue gas from a waste incineration plant becomes activated carbon or activated coke is blown into the smoke gas flow.
  • This Activated carbon or activated coke, the one with the unwanted Substances, especially chlorinated hydrocarbons, is loaded, are excreted from the flue gas stream.
  • activated carbon and activated coke must be thermally be treated so that the chlorinated Hydrocarbons can be destroyed. At this Treatment may also include ammonia, if present be recovered.
  • the treatment is carried out according to that in Example 1 described method, the oxygen content the flammability of activated carbon or activated coke particular attention is paid.
  • the Oxygen concentration should preferably be less than 2% be.
  • a light gas filter becomes Maintain overpressure on the cleaning side.
  • the filter candles are cleaned from the same Reason with inert gas.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Processing Of Solid Wastes (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Treatment Of Sludge (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Glass Compositions (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Claims (17)

  1. Procédé pour le traitement thermique de matières solides en forme de poudre et/ou finement divisées, séparées lors de la purification de gaz de fumée, en particulier d'installations d'incinération d'ordures ménagères, caractérisé en ce que l'on chauffe les matières solides en forme de poudre et/ou finement divisées au moyen d'un courant gazeux, lequel présente au moins la température nécessaire pour le traitement thermique des matières solides en forme de poudre et/ou finement divisées, le long d'un trajet de transport déterminé dans une installation de filtration et en ce que l'on évacue, après filtration, la matière solide en forme de poudre et/ou finement divisée.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on conduit le courant gazeux en cercle.
  3. Procédé selon l'une des revendications précédentes, caractérise en ce que l'on utilise comme courant gazeux le gaz de fumée libéré de la cendre volante.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on détruit par le traitement thermique des hydrocarbures halogénés, en particulier aromatiques, dans les matières solides en forme de poudre et/ou finement divisées, le traitement étant tel que l'on fait suivre le traitement thermique, à la suite de la filtration, d'un post-traitement thermique à l'état stationnaire.
  5. Procédé selon la revendication 4, caractérisé en ce que l'on effectue le posttraitement thermique à la suite de la filtration, par un séjour à la température de traitement sous une atmosphère de gaz inerte.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que l'on chauffe les matières solides en forme de poudre et/ou finement divisées au-dessus de 300 °C, de préférence au-dessus de 400 °C, et en ce que l'on effectue ensuite le post-traitement thermique pendant au moins 2 heures, de préférence pendant plus de 4 heures, à la même température.
  7. Procédé selon la revendication 6, caractérisé en ce que l'on maintient les matières solides en forme de poudre et/ou finement divisées sous une atmosphère de gaz inerte après le traitement thermique, pendant l'évacuation.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on effectue le traitement thermique à une concentration d'oxygène d'au plus 3 %.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on refroidit brusquement les matières solides en forme de poudre et/ou finement divisées après le traitement thermique.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on élimine des matières solides en forme de poudre et/ou finement divisées, par le traitement thermique, des constituants volatils, en particulier de l'ammoniac.
  11. Procédé selon la revendication 10, caractérisé en ce que l'on effectue le traitement thermique à plus de 300 °C.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce qu'on dissout l'ammoniac gazeux obtenu dans de l'eau, en ce qu'on élimine le mercure présent de la solution aqueuse obtenue, au moyen d'un échangeur d'ions, et en ce qu'on amène la solution aqueuse d'amoniac dépourvue de mercure au gaz de fumée de l'installation d'incinération d'ordures ménagères pour la réduction des oxydes d'azote.
  13. Installation pour mettre en oeuvre le procédé selon l'une des revendications précédentes, caractérisée par une conduite tubulaire (3) en liaison avec un ventilateur (15) et un dispositif de chauffage (4) pour le gaz, qui forme en même temps le trajet de transport et la chambre de traitement pour les matières solides en forme de poudre et/ou finement divisée, un dispositif d'introduction (2) de la matière solide étant disposé dans une zone terminale de la conduite tubulaire et un dispositif de filtration (6) étant disposé à l'autre extrémité de la conduite tubulaire, ce dispositif de filtration ayant des filtres en une matière résistant à la température.
  14. Installation selon la revendication 13, caractérisée en ce qu'une chambre de séjour (7) est disposée en communication avec le dispositif de filtration (6), le dispositif de filtration formant de préférence la fermeture d'un dispositif de séjour (7) pour le post-traitement thermique.
  15. Installation selon la revendication 13 ou 14, caractérisée en ce que la conduite tubulaire (3) débouche librement dans la chambre de séjour (7) avant le dispositif de filtration (6).
  16. Installation selon l'une des revendications 13 à 15, caractérisée en ce qu'elle comporte un dispositif de purification (12) sous forme d'un anneau poussoir pour la conduite tubulaire (3).
  17. Installation selon l'une des revendications 13 à 16 caractérisée en ce que la conduite tubulaire (3) est disposée verticalement, le dispositif d'alimentation débouchant dans sa zone finale supérieure et le dispositif de filtration étant disposé à la suite de son extrémité inférieure.
EP94108600A 1993-06-17 1994-06-06 Procédé pour le traitement thermique des solides separés pendant la purification des effluents gazeux Expired - Lifetime EP0629429B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1804/93 1993-06-17
CH01804/93A CH688912A5 (de) 1993-06-17 1993-06-17 Verfahren zur thermischen Behandlung von Feststoffen, die bei der Reinigung von Rauchgasen anfallen.

Publications (2)

Publication Number Publication Date
EP0629429A1 EP0629429A1 (fr) 1994-12-21
EP0629429B1 true EP0629429B1 (fr) 1998-04-29

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Family Applications (1)

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EP94108600A Expired - Lifetime EP0629429B1 (fr) 1993-06-17 1994-06-06 Procédé pour le traitement thermique des solides separés pendant la purification des effluents gazeux

Country Status (13)

Country Link
US (1) US5501161A (fr)
EP (1) EP0629429B1 (fr)
JP (1) JP2732220B2 (fr)
AT (1) ATE165527T1 (fr)
CA (1) CA2126055A1 (fr)
CH (1) CH688912A5 (fr)
DE (1) DE59405823D1 (fr)
DK (1) DK0629429T3 (fr)
ES (1) ES2065877T3 (fr)
FI (1) FI942879A (fr)
HU (1) HU216539B (fr)
NO (1) NO942233L (fr)
PL (1) PL303863A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7669349B1 (en) 2004-03-04 2010-03-02 TD*X Associates LP Method separating volatile components from feed material
US20090151609A1 (en) * 2007-12-15 2009-06-18 Hoskinson Gordon H Incinerator with pivoting grating system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55111999A (en) * 1979-02-20 1980-08-29 Sanyo Electric Co Voice synthesizer
DE3409106A1 (de) * 1984-03-13 1985-09-19 Deutsche Babcock Werke AG, 4200 Oberhausen Brennkammer
DE3703984A1 (de) * 1987-02-10 1988-08-18 Stuttgart Tech Werke Einrichtung zur zerstoerung von halogenierten aromaten, wie chlorierte dibenzodioxine, chlorierte dibenzofurane oder dgl., in flugaschen aus abfallverbrennungsanlagen
DE3744287A1 (de) * 1987-12-28 1989-07-13 Peter Voelskow Anordnung und vorrichtungen zur entgasung und dechlorierung organischer abfaelle
DE3802884A1 (de) * 1988-02-01 1989-08-10 Peters Ag Claudius Anlage zum entfernen von ammoniak aus flugasche
DE3836899C1 (fr) * 1988-10-29 1989-11-23 O & K Orenstein & Koppel Ag, 1000 Berlin, De
US5005495A (en) * 1989-11-28 1991-04-09 Feitel Frederick F Apparatus and method for removing volatile organic contaminants from particulate material
DE4015031A1 (de) * 1990-05-10 1991-11-14 Kgt Giessereitechnik Gmbh Verfahren zum thermischen regenerieren von in giessereien anfallenden altsanden, sowie zur behandlung der im sandkreislauf anfallenden staeube
DE4026508C2 (de) * 1990-08-22 1993-10-07 Metallgesellschaft Ag Verfahren zur Vermeidung der Bildung von hochkondensierten aromatischen Kohlenwasserstoffen und Dioxinen in Verbrennungsanlagen
JP2570012B2 (ja) * 1991-08-02 1997-01-08 日本鋼管株式会社 灰処理方法
JP3145446B2 (ja) * 1991-12-02 2001-03-12 三菱重工業株式会社 ダイオキシン類の分解装置
US5305696A (en) * 1992-10-05 1994-04-26 Mendenhall Robert Lamar Process and system for treating contaminated particulate soil compositions

Also Published As

Publication number Publication date
CA2126055A1 (fr) 1994-12-18
NO942233L (no) 1994-12-19
ES2065877T3 (es) 1998-08-01
HUT69597A (en) 1995-09-28
CH688912A5 (de) 1998-05-29
EP0629429A1 (fr) 1994-12-21
JP2732220B2 (ja) 1998-03-25
FI942879A (fi) 1994-12-18
FI942879A0 (fi) 1994-06-16
DK0629429T3 (da) 1998-10-07
PL303863A1 (en) 1994-12-27
HU9401724D0 (en) 1994-09-28
JPH0796268A (ja) 1995-04-11
ATE165527T1 (de) 1998-05-15
HU216539B (hu) 1999-07-28
ES2065877T1 (es) 1995-03-01
NO942233D0 (no) 1994-06-14
DE59405823D1 (de) 1998-06-04
US5501161A (en) 1996-03-26

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